feat(workspace): add workspace layout component with tabs and editor

src/app/(app)/problems/[id]/@workspace/layout.tsx

@@ -0,0 +1,30 @@
+import { SquarePenIcon } from "lucide-react";
+import { ScrollArea, ScrollBar } from "@/components/ui/scroll-area";
+import { Tabs, TabsContent, TabsList, TabsTrigger } from "@/components/ui/tabs";
+
+interface WorkspaceLayoutProps {
+  editor: React.ReactNode;
+}
+
+export default function WorkspaceLayout({ editor }: WorkspaceLayoutProps) {
+  return (
+    <Tabs defaultValue="editor" className="h-full flex flex-col">
+      <ScrollArea className="bg-muted">
+        <TabsList>
+          <TabsTrigger value="editor">
+            <SquarePenIcon
+              className="-ms-0.5 me-1.5 opacity-60"
+              size={16}
+              aria-hidden="true"
+            />
+            Editor
+          </TabsTrigger>
+        </TabsList>
+        <ScrollBar orientation="horizontal" />
+      </ScrollArea>
+      <TabsContent value="editor" className="h-full mt-0">
+        {editor}
+      </TabsContent>
+    </Tabs>
+  );
+}